Just to give an example. We recently had a few semi proffesional soccer players come in and try a session of Judo. These guys are training soccer 4 nights per week, have personal fitness trainers and are used to running up and down a soccer field for an entire game. In short they are very, very fit. After 20 mins of ichikomi (drill work) and 5 mins of sparring, 2 of these guys where puking.

See what I'm saying ? Fitness is sport specific, it all depends what your training for. If you do a striking art, do ten rounds on the heavy bag and **** loads of sparring. You get your conditioining right there. If your doing a grappling art, then roll more. Personally I don't mind a bit of running with hill sprints, burpees etc. It all helps.

You know how high your heart rate gets when your sweat covered body is pressed against a woman's...both your breathing increases to near panic-stricken levels as the tempo steadily increases to a frenzy of motion...